| Iowa City to Bonham (Texas) | 612.74 mi (986.12 km) |
| Iowa City to Bonita (California) | 1,527.84 mi (2,458.83 km) |
| Iowa City to Bonita Springs (Florida) | 1,193.49 mi (1,920.73 km) |
| Iowa City to Bonney Lake (Washington) | 1,548.62 mi (2,492.26 km) |
| Iowa City to Boone (Iowa) | 123.84 mi (199.31 km) |
| Iowa City to Boone (North Carolina) | 649.35 mi (1,045.02 km) |
| Iowa City to Borger (Texas) | 673.98 mi (1,084.66 km) |
| Iowa City to Bossier City (Louisiana) | 641.89 mi (1,033.03 km) |
| Iowa City to Boston (Massachusetts) | 1,048.46 mi (1,687.34 km) |
| Iowa City to Bostonia (California) | 1,518.29 mi (2,443.45 km) |
| Iowa City to Bothell (Washington) | 1,552.85 mi (2,499.07 km) |
| Iowa City to Bothell East (Washington) | 1,552.10 mi (2,497.86 km) |
| Iowa City to Bothell West (Washington) | 1,554.67 mi (2,502.01 km) |
| Iowa City to Boulder (Colorado) | 725.27 mi (1,167.21 km) |
| Iowa City to Boulder City (Nevada) | 1,318.35 mi (2,121.68 km) |
